mirror of https://gitee.com/openkylin/linux.git
311 lines
8.0 KiB
C
311 lines
8.0 KiB
C
/*
|
|
* Generic BitBLT function for frame buffer with packed pixels of any depth.
|
|
*
|
|
* Copyright (C) June 1999 James Simmons
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive for
|
|
* more details.
|
|
*
|
|
* NOTES:
|
|
*
|
|
* This function copys a image from system memory to video memory. The
|
|
* image can be a bitmap where each 0 represents the background color and
|
|
* each 1 represents the foreground color. Great for font handling. It can
|
|
* also be a color image. This is determined by image_depth. The color image
|
|
* must be laid out exactly in the same format as the framebuffer. Yes I know
|
|
* their are cards with hardware that coverts images of various depths to the
|
|
* framebuffer depth. But not every card has this. All images must be rounded
|
|
* up to the nearest byte. For example a bitmap 12 bits wide must be two
|
|
* bytes width.
|
|
*
|
|
* Tony:
|
|
* Incorporate mask tables similar to fbcon-cfb*.c in 2.4 API. This speeds
|
|
* up the code significantly.
|
|
*
|
|
* Code for depths not multiples of BITS_PER_LONG is still kludgy, which is
|
|
* still processed a bit at a time.
|
|
*
|
|
* Also need to add code to deal with cards endians that are different than
|
|
* the native cpu endians. I also need to deal with MSB position in the word.
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/fb.h>
|
|
#include <asm/types.h>
|
|
|
|
#define DEBUG
|
|
|
|
#ifdef DEBUG
|
|
#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt,__FUNCTION__,## args)
|
|
#else
|
|
#define DPRINTK(fmt, args...)
|
|
#endif
|
|
|
|
static u32 cfb_tab8[] = {
|
|
#if defined(__BIG_ENDIAN)
|
|
0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
|
|
0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
|
|
0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
|
|
0xffff0000,0xffff00ff,0xffffff00,0xffffffff
|
|
#elif defined(__LITTLE_ENDIAN)
|
|
0x00000000,0xff000000,0x00ff0000,0xffff0000,
|
|
0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00,
|
|
0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff,
|
|
0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff
|
|
#else
|
|
#error FIXME: No endianness??
|
|
#endif
|
|
};
|
|
|
|
static u32 cfb_tab16[] = {
|
|
#if defined(__BIG_ENDIAN)
|
|
0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
|
|
#elif defined(__LITTLE_ENDIAN)
|
|
0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
|
|
#else
|
|
#error FIXME: No endianness??
|
|
#endif
|
|
};
|
|
|
|
static u32 cfb_tab32[] = {
|
|
0x00000000, 0xffffffff
|
|
};
|
|
|
|
#define FB_WRITEL fb_writel
|
|
#define FB_READL fb_readl
|
|
|
|
static inline void color_imageblit(const struct fb_image *image,
|
|
struct fb_info *p, u8 __iomem *dst1,
|
|
u32 start_index,
|
|
u32 pitch_index)
|
|
{
|
|
/* Draw the penguin */
|
|
u32 __iomem *dst, *dst2;
|
|
u32 color = 0, val, shift;
|
|
int i, n, bpp = p->var.bits_per_pixel;
|
|
u32 null_bits = 32 - bpp;
|
|
u32 *palette = (u32 *) p->pseudo_palette;
|
|
const u8 *src = image->data;
|
|
|
|
dst2 = (u32 __iomem *) dst1;
|
|
for (i = image->height; i--; ) {
|
|
n = image->width;
|
|
dst = (u32 __iomem *) dst1;
|
|
shift = 0;
|
|
val = 0;
|
|
|
|
if (start_index) {
|
|
u32 start_mask = ~(FB_SHIFT_HIGH(~(u32)0, start_index));
|
|
val = FB_READL(dst) & start_mask;
|
|
shift = start_index;
|
|
}
|
|
while (n--) {
|
|
if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
|
|
p->fix.visual == FB_VISUAL_DIRECTCOLOR )
|
|
color = palette[*src];
|
|
else
|
|
color = *src;
|
|
color <<= FB_LEFT_POS(bpp);
|
|
val |= FB_SHIFT_HIGH(color, shift);
|
|
if (shift >= null_bits) {
|
|
FB_WRITEL(val, dst++);
|
|
|
|
val = (shift == null_bits) ? 0 :
|
|
FB_SHIFT_LOW(color, 32 - shift);
|
|
}
|
|
shift += bpp;
|
|
shift &= (32 - 1);
|
|
src++;
|
|
}
|
|
if (shift) {
|
|
u32 end_mask = FB_SHIFT_HIGH(~(u32)0, shift);
|
|
|
|
FB_WRITEL((FB_READL(dst) & end_mask) | val, dst);
|
|
}
|
|
dst1 += p->fix.line_length;
|
|
if (pitch_index) {
|
|
dst2 += p->fix.line_length;
|
|
dst1 = (u8 __iomem *)((long __force)dst2 & ~(sizeof(u32) - 1));
|
|
|
|
start_index += pitch_index;
|
|
start_index &= 32 - 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void slow_imageblit(const struct fb_image *image, struct fb_info *p,
|
|
u8 __iomem *dst1, u32 fgcolor,
|
|
u32 bgcolor,
|
|
u32 start_index,
|
|
u32 pitch_index)
|
|
{
|
|
u32 shift, color = 0, bpp = p->var.bits_per_pixel;
|
|
u32 __iomem *dst, *dst2;
|
|
u32 val, pitch = p->fix.line_length;
|
|
u32 null_bits = 32 - bpp;
|
|
u32 spitch = (image->width+7)/8;
|
|
const u8 *src = image->data, *s;
|
|
u32 i, j, l;
|
|
|
|
dst2 = (u32 __iomem *) dst1;
|
|
fgcolor <<= FB_LEFT_POS(bpp);
|
|
bgcolor <<= FB_LEFT_POS(bpp);
|
|
|
|
for (i = image->height; i--; ) {
|
|
shift = val = 0;
|
|
l = 8;
|
|
j = image->width;
|
|
dst = (u32 __iomem *) dst1;
|
|
s = src;
|
|
|
|
/* write leading bits */
|
|
if (start_index) {
|
|
u32 start_mask = ~(FB_SHIFT_HIGH(~(u32)0,start_index));
|
|
val = FB_READL(dst) & start_mask;
|
|
shift = start_index;
|
|
}
|
|
|
|
while (j--) {
|
|
l--;
|
|
color = (*s & (1 << l)) ? fgcolor : bgcolor;
|
|
val |= FB_SHIFT_HIGH(color, shift);
|
|
|
|
/* Did the bitshift spill bits to the next long? */
|
|
if (shift >= null_bits) {
|
|
FB_WRITEL(val, dst++);
|
|
val = (shift == null_bits) ? 0 :
|
|
FB_SHIFT_LOW(color,32 - shift);
|
|
}
|
|
shift += bpp;
|
|
shift &= (32 - 1);
|
|
if (!l) { l = 8; s++; };
|
|
}
|
|
|
|
/* write trailing bits */
|
|
if (shift) {
|
|
u32 end_mask = FB_SHIFT_HIGH(~(u32)0, shift);
|
|
|
|
FB_WRITEL((FB_READL(dst) & end_mask) | val, dst);
|
|
}
|
|
|
|
dst1 += pitch;
|
|
src += spitch;
|
|
if (pitch_index) {
|
|
dst2 += pitch;
|
|
dst1 = (u8 __iomem *)((long __force)dst2 & ~(sizeof(u32) - 1));
|
|
start_index += pitch_index;
|
|
start_index &= 32 - 1;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
/*
|
|
* fast_imageblit - optimized monochrome color expansion
|
|
*
|
|
* Only if: bits_per_pixel == 8, 16, or 32
|
|
* image->width is divisible by pixel/dword (ppw);
|
|
* fix->line_legth is divisible by 4;
|
|
* beginning and end of a scanline is dword aligned
|
|
*/
|
|
static inline void fast_imageblit(const struct fb_image *image, struct fb_info *p,
|
|
u8 __iomem *dst1, u32 fgcolor,
|
|
u32 bgcolor)
|
|
{
|
|
u32 fgx = fgcolor, bgx = bgcolor, bpp = p->var.bits_per_pixel;
|
|
u32 ppw = 32/bpp, spitch = (image->width + 7)/8;
|
|
u32 bit_mask, end_mask, eorx, shift;
|
|
const char *s = image->data, *src;
|
|
u32 __iomem *dst;
|
|
u32 *tab = NULL;
|
|
int i, j, k;
|
|
|
|
switch (bpp) {
|
|
case 8:
|
|
tab = cfb_tab8;
|
|
break;
|
|
case 16:
|
|
tab = cfb_tab16;
|
|
break;
|
|
case 32:
|
|
tab = cfb_tab32;
|
|
break;
|
|
}
|
|
|
|
for (i = ppw-1; i--; ) {
|
|
fgx <<= bpp;
|
|
bgx <<= bpp;
|
|
fgx |= fgcolor;
|
|
bgx |= bgcolor;
|
|
}
|
|
|
|
bit_mask = (1 << ppw) - 1;
|
|
eorx = fgx ^ bgx;
|
|
k = image->width/ppw;
|
|
|
|
for (i = image->height; i--; ) {
|
|
dst = (u32 __iomem *) dst1, shift = 8; src = s;
|
|
|
|
for (j = k; j--; ) {
|
|
shift -= ppw;
|
|
end_mask = tab[(*src >> shift) & bit_mask];
|
|
FB_WRITEL((end_mask & eorx)^bgx, dst++);
|
|
if (!shift) { shift = 8; src++; }
|
|
}
|
|
dst1 += p->fix.line_length;
|
|
s += spitch;
|
|
}
|
|
}
|
|
|
|
void cfb_imageblit(struct fb_info *p, const struct fb_image *image)
|
|
{
|
|
u32 fgcolor, bgcolor, start_index, bitstart, pitch_index = 0;
|
|
u32 bpl = sizeof(u32), bpp = p->var.bits_per_pixel;
|
|
u32 width = image->width;
|
|
u32 dx = image->dx, dy = image->dy;
|
|
u8 __iomem *dst1;
|
|
|
|
if (p->state != FBINFO_STATE_RUNNING)
|
|
return;
|
|
|
|
bitstart = (dy * p->fix.line_length * 8) + (dx * bpp);
|
|
start_index = bitstart & (32 - 1);
|
|
pitch_index = (p->fix.line_length & (bpl - 1)) * 8;
|
|
|
|
bitstart /= 8;
|
|
bitstart &= ~(bpl - 1);
|
|
dst1 = p->screen_base + bitstart;
|
|
|
|
if (p->fbops->fb_sync)
|
|
p->fbops->fb_sync(p);
|
|
|
|
if (image->depth == 1) {
|
|
if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
|
|
p->fix.visual == FB_VISUAL_DIRECTCOLOR) {
|
|
fgcolor = ((u32*)(p->pseudo_palette))[image->fg_color];
|
|
bgcolor = ((u32*)(p->pseudo_palette))[image->bg_color];
|
|
} else {
|
|
fgcolor = image->fg_color;
|
|
bgcolor = image->bg_color;
|
|
}
|
|
|
|
if (32 % bpp == 0 && !start_index && !pitch_index &&
|
|
((width & (32/bpp-1)) == 0) &&
|
|
bpp >= 8 && bpp <= 32)
|
|
fast_imageblit(image, p, dst1, fgcolor, bgcolor);
|
|
else
|
|
slow_imageblit(image, p, dst1, fgcolor, bgcolor,
|
|
start_index, pitch_index);
|
|
} else
|
|
color_imageblit(image, p, dst1, start_index, pitch_index);
|
|
}
|
|
|
|
EXPORT_SYMBOL(cfb_imageblit);
|
|
|
|
MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
|
|
MODULE_DESCRIPTION("Generic software accelerated imaging drawing");
|
|
MODULE_LICENSE("GPL");
|
|
|